I think l3+s stay around $8/10/day in profit, just the difference is how much ltc you get. Bitmain has done an amazing job pegging returns to USD in all of their ASICs besides the D3. (If you bought a D3 I feel bad for you. You got hosed, no if and or buts about it). So I think any purchases you will break even USD wise. The issue is whether your returns can break even in crypto spent. It gets really complicated mining stateside however since coins are immediately valued as USD income. All I'm getting to is I think you can continue to buy hardware unless next gen release in 2018. I have a feeling we may get nextgen in 2018 but I'd love for the can to be kicked until 2019. Seeing the new coupons, Bitmain either has LOTS of new units they need to sell or has next gen coming out soon. Ultimately it still means they have units to sell that aren't getting bought. This means maybe prices will continue to drop a bit more. Also, this new Asicboost stuff may change things. Feels too early. Has anyone received stuff bought from HalongMining? I saw those Blake miners for decred at $10k... that seems more risky then s9s or l3+s right now imho...